Open-source
Etebase is a secure, end-to-end encrypted, and privacy-respecting sync solution for contacts, calendars, tasks, and notes. It is easy to use, open source, and seamlessly integrates with existing apps. Etebase is an end-to-end encrypted backend that simplifies building encrypted applications. It offers features like end-to-end encryption, revision history, easy sharing,
webdav
WebDAV is an extension protocol to HTTP that allows users to create, move and edit remote documents on the server. WebDAV is widely used for file sharing, file collaboration between teams and groups. It is widely used in many enterprise apps as groupware, and ERP solutions. 10 Free Open-source Data
Productivity
InfCloud is a free open-source web-based CalDAV and CardDAV client that integrates both CardDavMATE and CalDavZAP in one platform. It supports multiple languages by default, and comes with dozens of features, and a user-friendly interface. CalDavZAP: A Self-hosted Open-source CalDAV ServerCalDavZAP is an open source CalDAV web client implementation released
Productivity
What is CardDAV? The CardDAV is an extension for the WebDAV which allows users to sync and backup their contact from CardDAV server to several clients and multiple devices. What is CardDavMate? CardDavMATE is an open source CardDAV (vCard) web client implementation released under GNU Affero General Public License (version
Self-hosted
What is Xandikos? Xandikos is a free open-source self-hosted CalDav and CardDav server that uses Git as a backend. It has been tested on a dozen of CalDav, and CardDav as well as vCard clients, which you will find in this post. Xandikos comes with a rich documentation for end-users,
Self-hosted
What are CalDav and CardDav? CalDav is an internet standard and protocol used to sync calendars across devices and services. It is often used to sync your calendar events between your calendar apps, webmail, devices and services. CardDav or vCard is an address book client/ server protocol and standard, as